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		//字面量
		console.log(3333);
		console.log(2.333);
		//e表示乘以10的几次方
		console.log(5e5);//500000   5*(10的5次方)

		console.log(5e1234567890);//infinity
		console.log(-5e1234567890); // -infinity

		console.log(0/0); //NaN
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